Researchers identify genes that give cannabis its flavor

Cannabis indica. Credit: Wikipedia

UBC scientists have scanned the genome of cannabis plants to find the genes responsible for giving various strains their lemony, skunky or earthy flavors, an important step for the budding legal cannabis industry.

"The goal is to develop well-defined and highly-reproducible cannabis varieties. This is similar to the , which depends on defined varieties such as chardonnay or merlot for high value products," said Jörg Bohlmann, a professor in the Michael Smith Laboratories and faculty of forestry at UBC. "Our genomics work can inform breeders of commercial varieties which genes to pay attention to for specific flavor qualities."

The research is part of an ongoing collaboration between Bohlmann, graduate student Judith Booth, and Jonathan Page, an adjunct professor in the botany department who founded the cannabis testing and biotechnology company Anandia Labs.

They found about 30 terpene synthase genes that contribute to diverse flavors in cannabis. This number is comparable to similar genes that play a role in grapevine flavor for the wine . The the researchers discovered play a role in producing natural products like limonene, myrcene, and pinene in the . These fragrant molecules are generally known in the industry as terpenes.

"The limonene compound produces a lemon-like flavor and myrcene produces the dank, earthy characteristic of purple kush," said Booth.

They also found a gene that produces the signature terpene of cannabis, beta-caryophyllene, which interacts with cannabinoid receptors in human cells along with other active ingredients in cannabis.

Bohlmann says the economic potential of a regulated cannabis industry is huge, but a current challenge is that growers are working with a crop that is not well standardized and highly variable for its key natural product profiles.

"There is a need for high-quality and consistent products made from well defined varieties." he said.

The researchers say it will also be important to examine to what extent terpene compounds might interact with the cannabinoid compounds such as tetrahydrocannabinol (THC) that confer the medicinal properties of cannabis.

The study was published today in PLOS ONE.

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More information: PLOS ONE, … journal.pone.0173911
Journal information: PLoS ONE

Citation: Researchers identify genes that give cannabis its flavor (2017, March 29) retrieved 22 September 2019 from
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Mar 29, 2017
This study was done on the hemp strain "Finola" and in their own discussion they refer to the notable differences in the few known genes in the drug form "Purple Kush" and those in "Finola" which produce the same terpene. The full library of terpene-producing genes in Cannabis varieties is likely to be quite huge.

I thought myrcene has a mango scent. It certainly contributes to both Old World mango scent and that of the mango ginger.

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